Update DEPS to use jsshell version 38.

deps/all.deps/DEPS

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 vars = {
   # The dart_root is the root of our dart checkout. This is normally
   # simply dart, but if using special gclient specs it can be different.
   "dart_root": "dart",
 
   # The svn location to pull out dependencies from
@@ skipping 30 matching lines @@
   "commons-lang_rev" : "@33092",
   "crypto_rev" : "@2df57a1e26dd88e8d0614207d4b062c73209917d",
   "csslib_tag" : "@0.12.0",
   "async_await_rev" : "@8b401a9f2e5e81dca5f70dbe7564112a0823dee6",
   "dart_services_rev" : "@7aea2574e6f3924bf409a80afb8ad52aa2be4f97",
   "dart_style_tag": "@0.1.8",
   "d8_rev" : "@39739",
   "eclipse_rev" : "@38742",
   "fake_async_rev" : "@38614",
   "fest_rev" : "@19997",
-  "firefox_jsshell_rev" : "@44282",
+  "firefox_jsshell_rev" : "@45554",
   "glob_rev": "@704cf75e4f26b417505c5c611bdaacd8808467dd",
   "gson_rev" : "@36048",
   "gsutil_rev" : "@33376",
   "guava_rev" : "@19997",
   "hamcrest_rev" : "@19997",
   "html_tag" : "@0.12.1+1",
   "http_rev" : "@9b93e1542c753090c50b46ef1592d44bc858bfe7",
   "http_multi_server_tag" : "@1.3.2",
   "http_parser_rev" : "@8b179e36aba985208e4c5fb15cfddd386b6370a4",
   "http_throttle_rev" : "@a81f08be942cdd608883c7b67795c12226abc235",
@@ skipping 289 matching lines @@
   },
   {
     "pattern": ".",
     "action": ["python", Var("dart_root") + "/editor/build/generate_sources.py"],
   },
   {
     "pattern": ".",
     "action": ["python", Var("dart_root") + "/tools/gyp_dart.py"],
   },
 ]